.sfbutton {
    padding: 0.5em 1em;
    display:inline-block;
    background-color:blue;
    color:white;
    text-decoration:none !important;
    font-weight:bold;
}

    .sfbutton.sfbutton-dark-transparent {
        border: 1px solid #333;
        color: #333;
        background: transparent;
    }
    .sfbutton.sfbutton-white-transparent {
        border: 1px solid #fff;
        color: #fff;
        background: transparent;
    }

    .sfbutton.sfbutton-white {
        border: 1px solid #fff;
        color: #333;
        background: #fff;
    }
    .sfbutton.sfbutton-dark {
        border: 1px solid #333;
        color: #fff;
        background: #333;
    }

    .sfbutton.sfbutton-dark-transparent-double {
        border: 4px double #333;
        color: #333;
        background: transparent;
    }

    .sfbutton.sfbutton-white-transparent-double {
        border: 4px double #fff;
        color: #fff;
        background: transparent;
    }

    .sfbutton.sfbutton-white-double {
        border: 4px double #fff;
        color: #333;
        background: #fff;
    }

    .sfbutton.sfbutton-dark-double {
        border: 4px double #fff;
        color: #fff;
        background: #333;
    }